Safran CORTEX CRT Quantum - Differential Coder

COMMAND RANGING & TELEMETRY UNIT CORTEX
CRT QUANTUM USER'S MANUAL
Ref. DTU 100042
Is.Rev. 5.17
Date: Dec.
03, 2021Sept. 30, 2021
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Page 66
3.3.6.3.3. Differential Coder
The differential coder depicted in Figure 20 is used to eliminate phase ambiguity on carrier synchronization for
each modulation efficiency. Table 10 gives the bit reference at input and output of the differential coder in each
case.
An example of differential encoder connections is given in Figure 20 for the 2 bits/channel-symbol case. The
structure of the modulo 8 adder is also shown; it is applicable to both the coder mapper and differential coder.